* {
    padding: 0;
    margin: 0;
}
ul {
    list-style-type: none;
    margin: 100px;
}
.menu_head {
    width: 185px;
    height: 47px;
    line-height: 47px;
    padding-left: 38px;
    font-size: 17px;
    color: #475052;
    cursor: pointer;
    border: 1px solid #e1e1e1;
    position: relative;
    margin: 0px;
    font-weight: bold;
    background: #f1f1f1 url(../img/pro_left.png) center right no-repeat;
    user-select: none;
}
.menu_list .current {
    background: #f1f1f1 url(../img/pro_down.png) center right no-repeat;
}
.menu_body {
    width: 223px;
    height: auto;
    overflow: hidden;
    line-height: 38px;
    border-left: 1px solid #e1e1e1;
    backguound: #fff;
    border-right: 1px solid #e1e1e1;
}
.menu_body a {
    display: block;
    width: 223px;
    height: 38px;
    line-height: 38px;
    padding-left: 38px;
    color: #777;
    background: #fff;
    text-decoration: none;
    border-bottom: 1px solid #e1e1e1;
}